For each word in the list on the left side: click and hold on the box beside it and choose one of the definitions in the list that pops up. When you're done, click on "Check Answers." If you score less than 85% (giving away one for carelessness), get out the dictionary, figure out the right answers, and take the test again until you get them all right. Then, most importantly, follow the recommendations in the section on Vocabulary Building to make these words part of your own vocabulary.